JPH07248522A - Optical device - Google Patents
Optical deviceInfo
- Publication number
- JPH07248522A JPH07248522A JP3966194A JP3966194A JPH07248522A JP H07248522 A JPH07248522 A JP H07248522A JP 3966194 A JP3966194 A JP 3966194A JP 3966194 A JP3966194 A JP 3966194A JP H07248522 A JPH07248522 A JP H07248522A
- Authority
- JP
- Japan
- Prior art keywords
- lens group
- optical axis
- magnetic force
- holding member
- optical device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Adjustment Of Camera Lenses (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はカメラや観測機器等の光
学装置に関し、特に、結像面における該ブレを補正する
ための像ブレ補正用光学素子を有している光学装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical device such as a camera or an observation instrument, and more particularly to an optical device having an image blur correcting optical element for correcting the blur on an image plane.
【０００２】[0002]
【従来の技術】手ブレ等の振動による撮影像のブレを抑
制する手段として、撮影レンズを構成する一部のレンズ
を光軸と垂直な方向へ移動させることによって像ブレを
抑制するブレ補正鏡筒が知られている。図６は従来のブ
レ補正機構を具備したズームレンズの構成図である。図
６において、１ａは第１レンズ群、１ｂは第２レンズ
群、１ｃは第３レンズ群、１ｄは第４レンズ群である。
その中で第２レンズ群１ｂがズーミングのために、第４
レンズ群１ｄがフォーカシングのために、それぞれ所定
範囲光軸方向に可動となっている。さらに第４レンズ群
１ｄを後述するブレ補正機構により、光軸方向と垂直な
方向に移動させる事によりブレを補正する。２は光学ロ
ーパスフィルタ、３はＣＣＤ等の撮像素子である。４は
第１レンズ群１ａ、第３レンズ群１ｃ、撮像素子３等を
保持している筐体である。５は第２レンズ群のレンズ保
持部材、６は第２レンズ群保持部材５の光軸方向移動を
案内するガイドバーである。７は光軸と平行な送りねじ
であり、第２レンズ群保持部材５に設けられたねじ孔に
螺合して該保持部材５を光軸方向に移動させる。送りね
じ７は片寄せばね８で付勢された片寄せ部材９にも噛み
合っており、該部材９により螺合部分のガタ取りを行っ
ている。第２レンズ群保持部材５はガイドバー６と送り
ねじ７とによって支持されつつ光軸方向に移動する。１
０はステップモータであって、該モータ１０はギヤ群１
１を介して送りねじ７を回転駆動して第２レンズ群保持
部材５を駆動する。１２は第４レンズ群１ｄ（すなわち
像ブレ補正レンズ）のレンズ枠であり、１３はレンズ枠
１２の保持枠である。レンズ枠１２は保持枠１３上に担
持されており、保持枠１３の前部フランヂ１３ａと後部
フランヂ１３ｂとに摺接しつつ光軸に垂直な方向へ（半
径方向へ）移動可能であるが、光軸方向には移動が規制
されている。１４は付勢バネである。１５は押し当てピ
ン、１６はブレ補正機構の駆動モータ、１７は駆動レバ
ー、である。付勢バネ１４はレンズ枠１２を図の上方向
に付勢し、押し当てピン１５の先端部は駆動レバー１７
によって付勢バネ１４の付勢方向に対向する方向に押さ
れ、それらによってレンズ枠１２の光軸方向に垂直な方
向の位置決めが行なわれる。2. Description of the Related Art As a means for suppressing blurring of a photographed image due to vibration such as camera shake, a blur correction mirror for suppressing image blur by moving a part of lenses constituting a photographing lens in a direction perpendicular to an optical axis. The cylinder is known. FIG. 6 is a block diagram of a zoom lens equipped with a conventional shake correction mechanism. In FIG. 6, 1a is a first lens group, 1b is a second lens group, 1c is a third lens group, and 1d is a fourth lens group.
Among them, the second lens group 1b is moved to the fourth
The lens group 1d is movable in a predetermined range along the optical axis for focusing. Further, the blur is corrected by moving the fourth lens group 1d in a direction perpendicular to the optical axis direction by a blur correction mechanism described later. Reference numeral 2 is an optical low-pass filter, and 3 is an image pickup device such as a CCD. Reference numeral 4 denotes a housing that holds the first lens group 1a, the third lens group 1c, the image pickup device 3, and the like. Reference numeral 5 is a lens holding member of the second lens group, and 6 is a guide bar for guiding the movement of the second lens group holding member 5 in the optical axis direction. A feed screw 7 is parallel to the optical axis and is screwed into a screw hole provided in the second lens group holding member 5 to move the holding member 5 in the optical axis direction. The feed screw 7 also meshes with a biasing member 9 which is biased by a biasing spring 8, and the member 9 removes backlash from the screwed portion. The second lens group holding member 5 moves in the optical axis direction while being supported by the guide bar 6 and the feed screw 7. 1
0 is a step motor, and the motor 10 is a gear group 1
The feed screw 7 is rotationally driven via 1 to drive the second lens group holding member 5. Reference numeral 12 is a lens frame of the fourth lens group 1d (that is, an image blur correction lens), and 13 is a holding frame of the lens frame 12. The lens frame 12 is carried on a holding frame 13, and is movable in a direction (radial direction) perpendicular to the optical axis while slidingly contacting the front flange 13a and the rear flange 13b of the holding frame 13. Movement is restricted in the axial direction. Reference numeral 14 is a biasing spring. Reference numeral 15 is a pressing pin, 16 is a drive motor of the shake correction mechanism, and 17 is a drive lever. The urging spring 14 urges the lens frame 12 upward in the drawing, and the tip of the pressing pin 15 is driven by the drive lever 17.
The urging spring 14 pushes the lens frame 12 in a direction opposite to the urging direction, and the lens frame 12 is positioned in the direction perpendicular to the optical axis direction.
【０００３】フォーカス用ステップモータ１８に直結し
た送りねじ１９と保持枠１３のねじ孔との螺合によって
保持枠１３が光軸方向に移動されることにより合焦動作
が行なわれる。２０は絞り部材であって、モータ等の動
力源２１によって絞りの開口径が変化する。Focusing operation is performed by moving the holding frame 13 in the optical axis direction by screwing the feed screw 19 directly connected to the focusing step motor 18 and the screw hole of the holding frame 13. A diaphragm member 20 changes the aperture diameter of the diaphragm by a power source 21 such as a motor.
【０００４】図７は、前述のブレ補正機構部分を対物側
から見た構成図である。図７において図６と同じ構成要
素には同一の番号を付し、ｘ方向の補正機構の構成要素
には参照番号にｘを、ｙ方向の補正機構の構成要素には
参照番号にｙを付加して表す。４０１は角速度計等のブ
レセンサであり、４０２は第４レンズ群１ｄのｘ方向及
びｙ方向の位置を検出する位置センサである。４０３は
ブレ補正機構の制御回路である。ブレセンサ４０１はレ
ンズ鏡筒すなわち前述の筐体４に固定されており、手ブ
レ等の振動を角速度として検出し、検出された信号が制
御回路４０３によって補正すべき変位値に変換される。
この変位値の出力信号によって駆動モータ１６が駆動さ
れ、駆動レバー１７及び押し当てピン１５を介して第４
レンズ群１ｄが動かされ像ブレが抑制されて画像は撮像
面で安定する。FIG. 7 is a block diagram of the above-mentioned shake correction mechanism as viewed from the objective side. In FIG. 7, the same components as those in FIG. 6 are denoted by the same reference numerals, x is added to the components of the correction mechanism in the x direction, and y is added to the components of the correction mechanism in the y direction. To represent. Reference numeral 401 is a shake sensor such as an angular velocity meter, and 402 is a position sensor that detects the position of the fourth lens group 1d in the x and y directions. Reference numeral 403 is a control circuit of the shake correction mechanism. The blur sensor 401 is fixed to the lens barrel, that is, the housing 4 described above, detects vibration such as camera shake as an angular velocity, and the detected signal is converted into a displacement value to be corrected by the control circuit 403.
The drive motor 16 is driven by the output signal of this displacement value, and the drive motor 16 is driven through the drive lever 17 and the pressing pin 15
The lens group 1d is moved to suppress image blur, and the image is stabilized on the image pickup surface.
【０００５】[0005]
【発明が解決しようとする課題】前述した従来例におい
ては、ズーミングやフォーカシングの際に光軸方向に移
動させなければならない移動レンズ枠に像ブレ補正機構
のすべてが搭載されているので該移動レンズ枠の総重量
が非常に大きなものとなっており、従って該移動レンズ
枠の慣性質量が非常に大きいのでズーミングやフォーカ
シングを迅速に行なうことが困難であり、ズーミングや
フォーカシングを迅速に行なうためには大出力のモータ
が必要となり、その結果、光学装置の大型化とコストの
増大とを招くばかりでなく、電力消費や摩擦損失や発生
騒音も大きくなるという欠点があった。In the above-mentioned conventional example, all of the image blur correction mechanism is mounted on the movable lens frame which must be moved in the optical axis direction during zooming and focusing, so that the movable lens is used. Since the total weight of the frame is very large, and therefore the inertial mass of the movable lens frame is very large, it is difficult to perform zooming and focusing quickly. In order to perform zooming and focusing quickly, A large output motor is required, resulting in not only an increase in size of the optical device and an increase in cost, but also a drawback that power consumption, friction loss, and generated noise increase.
【０００６】それ故、本発明の目的は、このような欠点
を持たない、改善された光学装置を提供することであ
る。Therefore, it is an object of the present invention to provide an improved optical device which does not have such drawbacks.
【０００７】[0007]
【課題を解決するための手段】前述した従来の光学装置
においては、レンズ枠が該光学装置に機械的接触を以て
支持されるとともに該レンズ枠の移動機構も前述の如き
送りねじヤヘリコイド等の機械的摩擦のある構造となっ
ているので該レンズ枠を起動させる時には静止摩擦力に
打ち勝つための大きな起動力を必要とし、また、駆動中
も動摩擦抵抗に打ち勝つだけの駆動力を必要とする。し
かも、該レンズ枠の重量を支えるために機械的剛性の高
い構造を必要とするので、該光学装置の剛性を高くする
ために該光学装置の重量も重いものにならざるを得な
い。In the above-mentioned conventional optical device, the lens frame is supported by the optical device by mechanical contact, and the moving mechanism of the lens frame is a mechanical device such as a feed screw yalicoid as described above. Since the structure has friction, a large starting force is required to overcome the static friction force when the lens frame is activated, and a driving force sufficient to overcome the dynamic friction resistance is required during driving. Moreover, since a structure having high mechanical rigidity is required to support the weight of the lens frame, the weight of the optical device must be heavy in order to increase the rigidity of the optical device.
【０００８】本発明では、前述した従来技術に内在する
このような問題点を解決する手段として、少なくとも像
ブレ補正用光学素子の保持枠を光学装置に非接触で支持
し、且つ非接触で移動させる構成を採用することにし
た。具体的には、像ブレ補正用光学素子の保持枠を含め
て移動レンズ保持枠を磁力によりフローティング支持す
る支持手段を設け、該支持手段の磁力を変化させること
により該レンズ保持枠を該光学装置に対して非接触で移
動させるようにした。なお、移動レンズ枠を磁力により
浮遊支持させ、且つ磁力により光軸方向に移動させる技
術思想は公知のものであり、例えば特開昭５９−１９８
４０９号公報に開示されている。In the present invention, at least the holding frame of the image blur correction optical element is supported by the optical device in a non-contact manner and moved in a non-contact manner as a means for solving the problems inherent in the above-mentioned prior art. I decided to adopt a configuration that allows it. Specifically, support means for floatingly supporting the movable lens holding frame including the holding frame of the image blur correction optical element by magnetic force is provided, and the magnetic force of the supporting means is changed to move the lens holding frame to the optical device. It was designed to be moved without contact. The technical idea of floatingly supporting the movable lens frame by magnetic force and moving it in the optical axis direction by magnetic force is well known, and is disclosed in, for example, JP-A-59-198.
No. 409 publication.
【０００９】本発明は、この公知の技術を応用すること
により前記従来の像ブレ補正機能付き光学装置の問題点
を解決したものである。The present invention solves the problems of the conventional optical device with the image blur correction function by applying this known technique.
【００１０】[0010]
【実施例】図１に本発明による光学装置に第一実施例の
断面図を示す。1 is a sectional view of a first embodiment of an optical device according to the present invention.
【００１１】図１において、３１は第１レンズ群、３２
は第２レンズ群、３３は第３レンズ群、３４は第４レン
ズ群である。その中で第２レンズ群３２がズーミングの
ために、第４レンズ群３４が焦点調節のために、それぞ
れ所定範囲光軸方向に可動となっている。また、第２レ
ンズ群３２及び第４レンズ群３４は像ブレ補正用光学素
子を兼ねており、該レンズ群を光軸方向と垂直な方向に
移動させる事により結像面における像ブレを補正する。
３７は光学ローパスフィルタ、３８はＣＣＤ等の撮像素
子である。４１は第１レンズ群３１、第３レンズ群３
３、撮像素子３８等を保持している筐体である。３５は
第２レンズ群保持部材、３９は絞り部材、４０は絞り部
材３９を駆動する駆動源、である。In FIG. 1, 31 is the first lens group, and 32 is
Is a second lens group, 33 is a third lens group, and 34 is a fourth lens group. Among them, the second lens group 32 is movable for zooming, and the fourth lens group 34 is movable in a predetermined range along the optical axis for focus adjustment. The second lens group 32 and the fourth lens group 34 also serve as image blur correction optical elements, and the image blur on the image plane is corrected by moving the lens group in the direction perpendicular to the optical axis direction. .
Reference numeral 37 is an optical low-pass filter, and 38 is an image pickup device such as a CCD. 41 is a first lens group 31 and a third lens group 3
3, a housing that holds the image sensor 38 and the like. Reference numeral 35 is a second lens group holding member, 39 is an aperture member, and 40 is a drive source for driving the aperture member 39.
【００１２】２０４〜２０７は第２レンズ群保持部材３
５及び第４レンズ群保持部材３６をそれぞれ光軸と垂直
な方向に筐体４１に対して非接触で保持するための永久
磁石あるいは電磁石等の磁力発生部材であり、２０１〜
２０３は第２レンズ群保持部材３５及び第４レンズ群保
持部材３６をそれぞれ光軸方向に筐体４１に対して非接
触で移動させ且つ浮遊支持するための永久磁石あるいは
電磁石等の磁力発生部材である。本実施例においてはズ
ーミングのために光軸方向に移動可能な第２レンズ群３
２と合焦のために光軸方向に移動可能な第４レンズ群３
４に対する支持手段及び駆動手段が同一の構成であるの
で、以下の説明においては第２レンズ群保持部材３５に
対して説明する。Reference numerals 204 to 207 denote second lens group holding members 3
A magnetic force generating member such as a permanent magnet or an electromagnet for holding the fifth and fourth lens group holding members 36 in a direction perpendicular to the optical axis in a non-contact manner with respect to the housing 41.
Reference numeral 203 denotes a magnetic force generating member such as a permanent magnet or an electromagnet for moving the second lens group holding member 35 and the fourth lens group holding member 36 in the optical axis direction in a non-contact manner with respect to the housing 41 and floatingly supporting them. is there. In the present embodiment, the second lens group 3 movable in the optical axis direction for zooming.
2 and a fourth lens group 3 which is movable in the optical axis direction for focusing.
Since the supporting means and the driving means for 4 have the same configuration, the second lens group holding member 35 will be described in the following description.
【００１３】図２は前記第２レンズ群保持部材３５に対
する支持手段及び駆動手段を構成する磁石の構成図であ
る。図２において２０１と２０２は永久磁石であり、筐
体４１に固定されている。２０３はコイルと鉄芯とから
成る電磁石であり、第２レンズ群保持部材３５に固定さ
れている。これらの磁石を用いて後述する方法により第
２レンズ群保持部材３５を光軸方向に非接触で移動させ
る。２０４と２０６は永久磁石であり、第２レンズ群保
持部材３５に固定されている。２０５と２０７は電磁石
であり、筐体４１に固定されている。これらの磁石を用
いて後述する方法により第２レンズ群保持部材３５を光
軸と垂直な方向に非接触で保持する。FIG. 2 is a structural diagram of a magnet which constitutes a supporting means and a driving means for the second lens group holding member 35. In FIG. 2, 201 and 202 are permanent magnets, which are fixed to the housing 41. Reference numeral 203 denotes an electromagnet including a coil and an iron core, which is fixed to the second lens group holding member 35. By using these magnets, the second lens group holding member 35 is moved in the optical axis direction in a non-contact manner by a method described later. Reference numerals 204 and 206 denote permanent magnets, which are fixed to the second lens group holding member 35. Reference numerals 205 and 207 are electromagnets, which are fixed to the housing 41. Using these magnets, the second lens group holding member 35 is held in a non-contact manner in a direction perpendicular to the optical axis by a method described later.
【００１４】４２は電磁石２０３，２０５，２０７の磁
力を変化させるための制御手段であり、該制御手段４２
には第２レンズ群保持部材３５の位置検出手段（図７）
の出力や不図示のブレセンサ（図７に示したものと同
じ）の出力が取込まれ、該制御手段４２は所定の演算に
より前記電磁石に対する通電時間や通電方向を制御す
る。Reference numeral 42 is a control means for changing the magnetic force of the electromagnets 203, 205, 207.
Is for detecting the position of the second lens group holding member 35 (FIG. 7).
And the output of a blur sensor (not shown) (the same as that shown in FIG. 7) are taken in, and the control means 42 controls the energization time and the energization direction of the electromagnet by a predetermined calculation.
【００１５】第２レンズ群保持部材３５を光軸方向に移
動させる方法は特開昭５９−１９８４０９に記載されて
いる方法と同じである。The method of moving the second lens group holding member 35 in the optical axis direction is the same as the method described in JP-A-59-198409.
【００１６】永久磁石２０１と永久磁石２０２の対向面
は同極性（図２においてはＮ極）になっている。電磁石
２０３に電流を通電し図２のような極性になると、第２
レンズ群保持部材３５は第３レンズ群方向（図２におい
ては右側）に移動し、電磁石２０３に逆方向の電流を通
電すると第２レンズ群保持部材３５は第１レンズ群方向
（図２においては左側）に移動する。したがって、電磁
石２０３に流れる電流を制御手段４２により制御するこ
とで、第２レンズ群保持部材３５の光軸方向の位置を制
御することができる。The facing surfaces of the permanent magnet 201 and the permanent magnet 202 have the same polarity (N pole in FIG. 2). When a current is applied to the electromagnet 203 and the polarity becomes as shown in FIG.
The lens group holding member 35 moves in the third lens group direction (right side in FIG. 2), and when a current in the opposite direction is applied to the electromagnet 203, the second lens group holding member 35 moves in the first lens group direction (in FIG. 2). Move to the left side). Therefore, by controlling the current flowing through the electromagnet 203 by the control means 42, the position of the second lens group holding member 35 in the optical axis direction can be controlled.
【００１７】第２レンズ群保持部材３５を光軸方向と垂
直な方向に非接触に支持する支持手段は永久磁石２０４
及び２０６と電磁石２０５及び２０７とで構成される。
電磁石２０５には永久磁石２０４と電磁石２０５の対向
面の極性が同極性になるように通電される。同様に、電
磁石２０７には永久磁石２０６と電磁石２０７の対向面
の極性が同極性になるように通電される。永久磁石２０
４と電磁石２０５及び永久磁石２０６と電磁石２０７と
は、磁力によりそれぞれ反発しあい、その反発力は電磁
石２０５及び２０７に流れる電流の大きさに依存するた
め、電磁石２０５及び２０７に流れる電流の大きさを制
御することにより第２レンズ群保持部材３５を光軸方向
と垂直方向の決められた位置に非接触保持することがで
きる。したがって不図示のブレセンサにより検出された
手ブレ等の振動を制御手段４２によって補正すべき変位
値に変換し電磁石２０５及び２０７に流れる電流の大き
さを制御することにより、第２レンズ群保持部材３５が
光軸方向と垂直な方向に動かされ像ブレが抑制されて画
像は撮像面で安定する。前述したように本実施例におい
ては第４レンズ群保持部材３６も同一の構成であるため
第４レンズ群３４においてもブレ補正が可能である。The supporting means for supporting the second lens group holding member 35 in a direction perpendicular to the optical axis direction without contact is a permanent magnet 204.
And 206 and electromagnets 205 and 207.
The electromagnet 205 is energized so that the facing surfaces of the permanent magnet 204 and the electromagnet 205 have the same polarity. Similarly, the electromagnet 207 is energized so that the facing surfaces of the permanent magnet 206 and the electromagnet 207 have the same polarity. Permanent magnet 20
4 and the electromagnet 205, and the permanent magnet 206 and the electromagnet 207 repel each other due to the magnetic force, and the repulsive force depends on the magnitude of the current flowing through the electromagnets 205 and 207. Therefore, the magnitude of the current flowing through the electromagnets 205 and 207 is By controlling, the second lens group holding member 35 can be held in a non-contact manner at a predetermined position in the direction perpendicular to the optical axis direction. Therefore, the vibration of the camera shake or the like detected by the blur sensor (not shown) is converted into a displacement value to be corrected by the control means 42 and the magnitude of the current flowing through the electromagnets 205 and 207 is controlled to control the second lens group holding member 35. Is moved in a direction perpendicular to the optical axis direction, image blur is suppressed, and the image is stabilized on the imaging surface. As described above, in the present embodiment, the fourth lens group holding member 36 also has the same configuration, so that the fourth lens group 34 can also perform blur correction.
【００１８】また、電磁石２０３に電流を通電し、第１
レンズ群方向（図２においては左側）あるいは第３レン
ズ群方向（図２においては右側）に第２レンズ群３２を
移動し、電磁石２０３と永久磁石２０１あるいは永久磁
石２０２が吸着した後は、電磁石２０３，２０５，２０
７への通電を止めても、電磁石２０３の鉄芯と永久磁石
２０１あるいは永久磁石２０２とが吸着しているので、
第２レンズ群保持部材３５は筐体４１に対して固定支持
される。Further, a current is passed through the electromagnet 203, and the first
After the second lens group 32 is moved in the lens group direction (left side in FIG. 2) or the third lens group direction (right side in FIG. 2) and the electromagnet 203 and the permanent magnet 201 or the permanent magnet 202 are attracted, the electromagnet 203, 205, 20
Even when the power supply to 7 is stopped, the iron core of the electromagnet 203 and the permanent magnet 201 or the permanent magnet 202 are attracted to each other.
The second lens group holding member 35 is fixedly supported on the housing 41.
【００１９】以上説明したように、本実施例の構成にお
いては、可動レンズ群のレンズ保持部材はレンズ鏡筒と
非接触支持されているので、高速なオートフォーカスあ
るいはズーミング動作が可能なブレ補正鏡筒を実現でき
る。As described above, in the structure of the present embodiment, the lens holding member of the movable lens group is supported in non-contact with the lens barrel, so that a shake correction mirror capable of high-speed autofocusing or zooming operation is provided. A cylinder can be realized.
【００２０】前記実施例においては第２レンズ群保持部
材３５の光軸方向と垂直方向の非接触支持に磁力による
反発を利用しているが、電磁石２０５及び２０７に流れ
る電流の方向を永久磁石２０４，２０６と電磁石２０
５，２０７との対向面の極性が異極性になるように通電
磁力による吸引を利用して第２レンズ群保持部材３５を
光軸方向と垂直方向に非接触支持してもよい。また、図
３のように永久磁石２０４，２０６の代わりに電磁石５
０１，５０２を第２レンズ群保持部材３５の外周面に固
定した構成にしてもよい。さらに、図４に示すように、
第２レンズ群保持部材３５の光軸方向の位置を制御する
ための永久磁石あるいは電磁石等の磁力発生部材の着磁
方向が光軸方向になるように配置した構成でもよい。図
４において、６０１と６０３は永久磁石であり、６０２
と６０４は電磁石である。電磁石６０２には永久磁石６
０１と磁極の向きが同じになるように通電される。この
とき永久磁石６０１と電磁石６０２とは磁力により反発
しあう。同様に、電磁石６０４にも通電され、永久磁石
６０３と電磁石６０４とは磁力により反発しあう。した
がって電磁石６０２，６０４に流れる電流を制御するこ
とにより第２レンズ群保持部材３５（もしくは第４レン
ズ群保持部材３６）を光軸方向と垂直方向の決められた
位置に非接触支持することができる。In the above embodiment, the repulsion by the magnetic force is used for the non-contact support of the second lens group holding member 35 in the direction perpendicular to the optical axis direction, but the direction of the current flowing through the electromagnets 205 and 207 is changed to the permanent magnet 204. , 206 and electromagnet 20
The second lens group holding member 35 may be supported in a non-contact manner in a direction perpendicular to the optical axis direction by utilizing suction by an energizing magnetic force so that the polarities of the surfaces opposed to 5, 207 are different. Further, as shown in FIG. 3, instead of the permanent magnets 204 and 206, the electromagnet 5
The configuration may be such that 01 and 502 are fixed to the outer peripheral surface of the second lens group holding member 35. Furthermore, as shown in FIG.
A configuration may be adopted in which a magnetic force generating member such as a permanent magnet or an electromagnet for controlling the position of the second lens group holding member 35 in the optical axis direction is arranged so that the magnetizing direction is the optical axis direction. In FIG. 4, 601 and 603 are permanent magnets, and 602
And 604 are electromagnets. The electromagnet 602 has a permanent magnet 6
The current is energized so that the direction of the magnetic pole is the same as that of 01. At this time, the permanent magnet 601 and the electromagnet 602 repel each other due to the magnetic force. Similarly, the electromagnet 604 is also energized, and the permanent magnet 603 and the electromagnet 604 repel each other due to the magnetic force. Therefore, by controlling the current flowing through the electromagnets 602 and 604, the second lens group holding member 35 (or the fourth lens group holding member 36) can be supported in a non-contact manner at a predetermined position in the direction perpendicular to the optical axis direction. .
【００２１】また、例えば図５に示すように永久磁石に
プラスチック磁石等を用いることで可動レンズ保持部材
あるいは筐体と一体で成形してもよい。図５において、
７０１及び７０２は筐体４１と一体成形で着磁されたプ
ラスチック磁石部分であり、７０３は可動レンズ保持部
材（３５，３６）と一体成形で着磁されたプラスチック
磁石部分である。このような構成によれば製造コストを
安価にすることができる。Further, as shown in FIG. 5, for example, a plastic magnet or the like may be used for the permanent magnet to integrally mold the movable lens holding member or the housing. In FIG.
Reference numerals 701 and 702 denote plastic magnet portions that are integrally formed and magnetized with the housing 41, and 703 is a plastic magnet portion that is integrally formed and magnetized with the movable lens holding member (35, 36). With such a configuration, the manufacturing cost can be reduced.
【００２２】[0022]
【発明の効果】以上に説明したように、本発明の光学装
置では、像ブレ補正用光学素子の保持枠を光学装置に対
して磁力で浮遊支持させるとともにブレ検出手段の出力
信号を取り込む制御手段により該磁力を制御するように
したので、従来の像ブレ補正機能付き光学装置における
像ブレ補正光学手段の駆動に関する問題点が解決され、
その結果、従来装置よりも軽量且つ小型で、静粛な動作
が可能で、また、経済性の高い、改善された光学装置を
実現できる。As described above, in the optical device of the present invention, the holding means for the image blur correction optical element is floatingly supported by the magnetic force with respect to the optical device, and the control means for fetching the output signal of the blur detection means is used. Since the magnetic force is controlled by the above, the problems relating to the drive of the image blur correction optical means in the conventional optical device with the image blur correction function are solved,
As a result, it is possible to realize an improved optical device that is lighter and smaller than the conventional device, can operate quietly, and is highly economical.
【図１】本発明による光学装置の一実施例の断面図。FIG. 1 is a sectional view of an embodiment of an optical device according to the present invention.
【図２】図１に示した一部についての詳細図。FIG. 2 is a detailed view of a part shown in FIG.
【図３】図２に示した部分の変形実施例を示した図。FIG. 3 is a diagram showing a modified embodiment of the portion shown in FIG.
【図４】図２に示した部分の変形実施例を示した図。FIG. 4 is a diagram showing a modified example of the portion shown in FIG.
【図５】図２に示した部分の変形実施例を示した図。5 is a diagram showing a modified example of the portion shown in FIG.
【図６】像ブレ補正機構を内蔵する公知のレンズ鏡筒の
概略断面図。FIG. 6 is a schematic cross-sectional view of a known lens barrel having a built-in image blur correction mechanism.
【図７】図６に示した構造のうちで像ブレ補正機構の部
分のみを抜き出してレンズ鏡筒の先端側から見た概念
図。FIG. 7 is a conceptual diagram of the structure shown in FIG. 6 in which only the image blur correction mechanism is extracted and viewed from the front end side of the lens barrel.
１ａ…第１レンズ群 １ｂ…第２レン
ズ群 １ｃ…第３レンズ群 １ｄ…第４レン
ズ群 ２…光学ローパスフィルタ ３…撮像素子 ４…筐体 ５…第２レンズ
群保持部材 ６…ガイドバー ７…送りねじ ８…片寄せバネ ９…片寄せ部材 １０…ステップモータ １１…ギヤ群 １２…レンズ枠 １３…保持枠 １４…付勢バネ １５…押し当て
ピン １６…ブレ補正用モータ １７…駆動レバ
ー １８…フォーカス用ステップモータ １９…送りねじ ２０…絞り部材 ２１…動力源 ３１…第１レンズ群 ３２…第２レン
ズ群 ３３…第３レンズ群 ３４…第４レン
ズ群 ３５…第２レンズ群保持部材 ３６…第４レン
ズ群保持部材 ３７…光学ローパスフィルタ ３８…撮像素子 ３９…絞り部材 ４０…動力源 ４１…筐体 ４２…制御手段 ２０１，２０２，２０４，２０６…永久磁石 ２０３，２０５，２０７，５０１，５０２，６０２，６
０４…電磁石 ７０１〜７０３…プラスチック磁石部分1a ... 1st lens group 1b ... 2nd lens group 1c ... 3rd lens group 1d ... 4th lens group 2 ... Optical low pass filter 3 ... Imaging element 4 ... Housing 5 ... 2nd lens group holding member 6 ... Guide bar 7 ... Feed screw 8 ... Offset spring 9 ... Offset member 10 ... Step motor 11 ... Gear group 12 ... Lens frame 13 ... Holding frame 14 ... Energizing spring 15 ... Pushing pin 16 ... Shake correction motor 17 ... Drive lever 18 Focusing step motor 19 Feed screw 20 Aperture member 21 Power source 31 First lens group 32 Second lens group 33 Third lens group 34 Fourth lens group 35 Second lens group holding member 36 ... Fourth lens group holding member 37 ... Optical low-pass filter 38 ... Imaging element 39 ... Aperture member 40 ... Power source 41 ... Housing 42 ... Control means 201, 202, 204, 206 ... Permanent Magnet 203,205,207,501,502,602,6
04 ... Electromagnet 701-703 ... Plastic magnet part
Claims (3)
像ブレ補正用光学素子を有している光学装置において、 該像ブレ補正用光学素子の保持枠を該光学装置に磁力で
フローティング支持する支持手段と、該支持手段の磁力
を制御することにより該保持枠を該光学装置の光軸に直
交する方向に移動可能にする磁力制御手段と、を有して
いることを特徴とする光学装置。1. An optical device having an image blur correction optical element for correcting image blur on an image forming surface, wherein a holding frame of the image blur correction optical element is floatingly supported on the optical device by magnetic force. And a magnetic force control unit for controlling the magnetic force of the supporting unit to move the holding frame in a direction orthogonal to the optical axis of the optical device. apparatus.
のであることを特徴とする請求項１の光学装置。2. The optical device according to claim 1, wherein the supporting means utilizes repulsive force of magnetic force.
のであることを特徴とする請求項１の光学装置。3. The optical device according to claim 1, wherein the support means utilizes a magnetic attraction force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3966194A JPH07248522A (en) | 1994-03-10 | 1994-03-10 | Optical device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3966194A JPH07248522A (en) | 1994-03-10 | 1994-03-10 | Optical device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07248522A true JPH07248522A (en) | 1995-09-26 |
Family
ID=12559276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3966194A Pending JPH07248522A (en) | 1994-03-10 | 1994-03-10 | Optical device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07248522A (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6018420A (en) * | 1997-12-02 | 2000-01-25 | Asahi Kogaku Kogyo Kabushiki Kaisha | Binocular having hand-vibration compensation system |
| US6038072A (en) * | 1997-12-02 | 2000-03-14 | Asahi Kogaku Kogyo Kabushiki Kaisha | Binocular having hand-vibration compensation system |
| US6043934A (en) * | 1997-12-02 | 2000-03-28 | Asahi Kogaku Kogyo Kabushiki Kaisha | Observing equipment having hand-vibration compensation system |
| US6057963A (en) * | 1997-12-02 | 2000-05-02 | Asahi Kogaku Kogyo Kabushiki Kaisha | Binocular having hand-vibration compensation system |
| US6057962A (en) * | 1997-12-02 | 2000-05-02 | Asahi Kogaku Kogyo Kabushiki Kaisha | Observation optical system having hand-vibration compensation system |
| US6226124B1 (en) | 1998-09-30 | 2001-05-01 | Asahi Kogaku Kogyo Kabushiki Kaisha | Tremble correction device |
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| US7161621B2 (en) | 2001-01-09 | 2007-01-09 | Nikon Corporation | Image-capturing device with position detector for vibration reduction |
| JP2008065073A (en) * | 2006-09-07 | 2008-03-21 | Tamron Co Ltd | Actuator, lens unit having the same, and camera |
| JP2008225158A (en) * | 2007-03-14 | 2008-09-25 | Hoya Corp | Stage device and camera shake correcting device using the stage device |
| JP2009053554A (en) * | 2007-08-28 | 2009-03-12 | Sony Corp | Image stabilizer, lens barrel, and imaging apparatus |
| WO2009122006A1 (en) * | 2008-04-03 | 2009-10-08 | Nokia Corporation | Camera module having movable lens |
| JP2010085447A (en) * | 2008-09-29 | 2010-04-15 | Nidec Copal Corp | Image blurring correction device, imaging lens unit, and light amount control device |
| US20110194091A1 (en) * | 2008-08-11 | 2011-08-11 | Carl Zeiss Smt Gmbh | Low-contamination optical arrangement |
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| JP2017102446A (en) * | 2015-11-25 | 2017-06-08 | パナソニックＩｐマネジメント株式会社 | Lens barrel |
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1994
- 1994-03-10 JP JP3966194A patent/JPH07248522A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6018420A (en) * | 1997-12-02 | 2000-01-25 | Asahi Kogaku Kogyo Kabushiki Kaisha | Binocular having hand-vibration compensation system |
| US6038072A (en) * | 1997-12-02 | 2000-03-14 | Asahi Kogaku Kogyo Kabushiki Kaisha | Binocular having hand-vibration compensation system |
| US6043934A (en) * | 1997-12-02 | 2000-03-28 | Asahi Kogaku Kogyo Kabushiki Kaisha | Observing equipment having hand-vibration compensation system |
| US6057963A (en) * | 1997-12-02 | 2000-05-02 | Asahi Kogaku Kogyo Kabushiki Kaisha | Binocular having hand-vibration compensation system |
| US6057962A (en) * | 1997-12-02 | 2000-05-02 | Asahi Kogaku Kogyo Kabushiki Kaisha | Observation optical system having hand-vibration compensation system |
| US6226124B1 (en) | 1998-09-30 | 2001-05-01 | Asahi Kogaku Kogyo Kabushiki Kaisha | Tremble correction device |
| US7161621B2 (en) | 2001-01-09 | 2007-01-09 | Nikon Corporation | Image-capturing device with position detector for vibration reduction |
| JP2006178154A (en) * | 2004-12-22 | 2006-07-06 | Pentax Corp | Imaging device |
| JP2008065073A (en) * | 2006-09-07 | 2008-03-21 | Tamron Co Ltd | Actuator, lens unit having the same, and camera |
| JP2008225158A (en) * | 2007-03-14 | 2008-09-25 | Hoya Corp | Stage device and camera shake correcting device using the stage device |
| JP2009053554A (en) * | 2007-08-28 | 2009-03-12 | Sony Corp | Image stabilizer, lens barrel, and imaging apparatus |
| US7822331B2 (en) | 2007-08-28 | 2010-10-26 | Sony Corporation | Image blur correction device, lens barrel and imaging apparatus |
| WO2009122006A1 (en) * | 2008-04-03 | 2009-10-08 | Nokia Corporation | Camera module having movable lens |
| US8041201B2 (en) | 2008-04-03 | 2011-10-18 | Nokia Corporation | Camera module having movable lens |
| US20110194091A1 (en) * | 2008-08-11 | 2011-08-11 | Carl Zeiss Smt Gmbh | Low-contamination optical arrangement |
| US9316930B2 (en) * | 2008-08-11 | 2016-04-19 | Carl Zeiss Smt Gmbh | Low-contamination optical arrangement |
| JP2010085447A (en) * | 2008-09-29 | 2010-04-15 | Nidec Copal Corp | Image blurring correction device, imaging lens unit, and light amount control device |
| US8218018B2 (en) | 2008-09-29 | 2012-07-10 | Canon Kabushiki Kaisha | Optical apparatus |
| JP2017102446A (en) * | 2015-11-25 | 2017-06-08 | パナソニックＩｐマネジメント株式会社 | Lens barrel |
| JP2017107190A (en) * | 2015-11-30 | 2017-06-15 | リコーイメージング株式会社 | Imaging device, image projection device, and stage device |
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